trustmebro.to/r/…
✓ checked
trust me, bro:
here is the receipt.
the claim

Sharks must keep swimming constantly in order to breathe.

the verdict
REFUTED
the evidence says no
Recorded sources
1 source for · 4 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that sharks must keep swimming constantly in order to breathe?

No. Multiple sources state that the belief all sharks must swim constantly to breathe is false: most sharks use buccal pumping and can rest stationary, though some species such as hammerheads and great whites are obligate ram ventilators. One literary source repeats the weaker claim that many sharks need constant swimming.

Verdict: REFUTED · 1 source for, 4 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 1
Shark Heart
2016
Get citation
Shark Heart. (2016). hdl.handle.net. http://hdl.handle.net/10919/73493

Evidence against · 4
Do sharks die if they stop swimming?
2013
Get citation
Do sharks die if they stop swimming?. (2013). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/17483/do-sharks-die-if-they-stop-swimming

See more details
More against · 3
Just keep swimming? Observations of resting behavior in gray reef sharks Carcharhinus amblyrhynchos (Bleeker, 1856)
2023
Get citation
W., B. R., Craig, F., & E., L. J. S. (2023). Just keep swimming? Observations of resting behavior in gray reef sharks Carcharhinus amblyrhynchos (Bleeker, 1856). zenodo.org. https://doi.org/10.1111/jfb.15623

F I G U R E 1 in Just keep swimming? Observations of resting behavior in gray reef sharks Carcharhinus amblyrhynchos (Bleeker, 1856)
2023
Get citation
W., B. R., Craig, F., & E., L. J. S. (2023). F I G U R E 1 in Just keep swimming? Observations of resting behavior in gray reef sharks Carcharhinus amblyrhynchos (Bleeker, 1856). zenodo.org. https://doi.org/10.5281/zenodo.17002265

Do sharks never sleep?
2012
Get citation
Do sharks never sleep?. (2012). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/8595/do-sharks-never-sleep

Receipt History
Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.
Check your own claim
Challenge the receipt
Requests are recorded for review. This does not start an automatic check or guarantee a response time.

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work